How to reproduce it :

• apply after to do a modification into the model I apply the model to the all skins
• Note that it works once in 5 ( 1 / 5)

  Date:			Fri Jul 07 15:58:14 CEST 2017 (1499435894904)
  Thread:		http-nio-8091-exec-17
  Message #:	15
  Level:		ERROR
  NDC:			
  Category:	org.ametys.plugins.core.ui
  Message:		Can not dispatch request '2' : 'core-ui' 'client-call' '{role=org.ametys.skinfactory.model.SkinModelDAO, methodName=applyModelToAll, parameters=[paris]}'
  Location:	org.apache.cocoon.util.log.SLF4JLoggerAdapter.error(SLF4JLoggerAdapter.java:46)
  Thrown:
  org.apache.cocoon.util.location.LocatedException: Can not dispatch request '2' : 'core-ui' 'client-call' '{role=org.ametys.skinfactory.model.SkinModelDAO, methodName=applyModelToAll, parameters=[paris]}'
  	at org.ametys.core.ui.dispatcher.DispatchGenerator._dispatching(DispatchGenerator.java:179)
  	at org.ametys.core.ui.dispatcher.DispatchGenerator.generate(DispatchGenerator.java:91)
  	at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.processXMLPipeline(AbstractProcessingPipeline.java:581)
  	at org.apache.cocoon.components.pipeline.impl.AbstractCachingProcessingPipeline.processXMLPipeline(AbstractCachingProcessingPipeline.java:301)
  	at org.apache.cocoon.components.pipeline.AbstractProcessingPipeline.process(AbstractProcessingPipeline.java:483)
  	at org.apache.cocoon.components.treeprocessor.sitemap.SerializeNode.invoke(SerializeNode.java:144)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
  	at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:236)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:178)
  	at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:254)
  	at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNode.java:118)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
  	at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:236)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:178)
  	at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:254)
  	at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNode.java:118)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
  	at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:236)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:178)
  	at org.apache.cocoon.components.treeprocessor.TreeProcessor.process(TreeProcessor.java:254)
  	at org.apache.cocoon.Cocoon.process(Cocoon.java:699)
  	at org.ametys.runtime.servlet.RuntimeServlet.service(RuntimeServlet.java:543)
  	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
  	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
  	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
  	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
  	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
  	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
  	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
  	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80)
  	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
  	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
  	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
  	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799)
  	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
  	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861)
  	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455)
  	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
  	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
  	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
  	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
  	at java.lang.Thread.run(Thread.java:745)
  Caused by: org.apache.excalibur.source.SourceException: Cannot get input stream for cocoon://_plugins/core-ui/client-call?role=org.ametys.skinfactory.model.SkinModelDAO&methodName=applyModelToAll&parameters=paris&
  	at org.apache.cocoon.components.source.impl.SitemapSource.getInputStream(SitemapSource.java:253)
  	at org.ametys.core.ui.dispatcher.DispatchGenerator._dispatching(DispatchGenerator.java:151)
  	... 58 more
  Caused by: org.xml.sax.SAXException: Could not get sitemap source cocoon://_plugins/core-ui/client-call?role=org.ametys.skinfactory.model.SkinModelDAO&methodName=applyModelToAll&parameters=paris&
  org.apache.cocoon.ProcessingException: Sitemap: error when calling sub-sitemap
  	at <map:mount> - resource://org/ametys/runtime/kernel/sitemap.xmap:151:82
  	at org.apache.cocoon.components.source.impl.SitemapSource.init(SitemapSource.java:380)
  	at org.apache.cocoon.components.source.impl.SitemapSource.<init>(SitemapSource.java:215)
  	at org.apache.cocoon.components.source.impl.SitemapSourceFactory.getSource(SitemapSourceFactory.java:68)
  	at org.apache.excalibur.source.impl.SourceResolverImpl.resolveURI(SourceResolverImpl.java:208)
  	at org.apache.cocoon.components.CocoonComponentManager.resolveURI(CocoonComponentManager.java:558)
  	at org.apache.cocoon.components.CocoonComponentManager.resolveURI(CocoonComponentManager.java:558)
  	at org.apache.cocoon.components.CocoonComponentManager.resolveURI(CocoonComponentManager.java:558)
  	at org.ametys.core.ui.dispatcher.DispatchGenerator._dispatching(DispatchGenerator.java:147)
  	... 58 more
  Caused by: org.apache.cocoon.ProcessingException: Sitemap: error when calling sub-sitemap
  	at <map:mount> - resource://org/ametys/runtime/kernel/sitemap.xmap:151:82
  	at org.apache.cocoon.ProcessingException.throwLocated(ProcessingException.java:113)
  	at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNode.java:122)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
  	at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:236)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.buildPipeline(ConcreteTreeProcessor.java:194)
  	at org.apache.cocoon.components.treeprocessor.TreeProcessor.buildPipeline(TreeProcessor.java:267)
  	at org.apache.cocoon.components.source.impl.SitemapSource.init(SitemapSource.java:333)
  	... 65 more
  Caused by: java.lang.reflect.InvocationTargetException
  	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
  	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
  	at java.lang.reflect.Method.invoke(Method.java:498)
  	at org.ametys.core.ui.ExecuteClientCallsAction._executeMethod(ExecuteClientCallsAction.java:141)
  	at org.ametys.core.ui.ExecuteClientCallsAction.act(ExecuteClientCallsAction.java:120)
  	at org.apache.cocoon.components.treeprocessor.sitemap.ActTypeNode.invoke(ActTypeNode.java:120)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:47)
  	at org.apache.cocoon.components.treeprocessor.sitemap.MatchNode.invoke(MatchNode.java:108)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelineNode.invoke(PipelineNode.java:143)
  	at org.apache.cocoon.components.treeprocessor.AbstractParentProcessingNode.invokeNodes(AbstractParentProcessingNode.java:69)
  	at org.apache.cocoon.components.treeprocessor.sitemap.PipelinesNode.invoke(PipelinesNode.java:93)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.process(ConcreteTreeProcessor.java:236)
  	at org.apache.cocoon.components.treeprocessor.ConcreteTreeProcessor.buildPipeline(ConcreteTreeProcessor.java:194)
  	at org.apache.cocoon.components.treeprocessor.TreeProcessor.buildPipeline(TreeProcessor.java:267)
  	at org.apache.cocoon.components.treeprocessor.sitemap.MountNode.invoke(MountNode.java:111)
  	... 75 more
  Caused by: org.apache.commons.io.FileExistsException: Destination 'D:\Dev\Sources\Univ_Paris4_cms\web\skins\paris4etud' already exists
  	at org.apache.commons.io.FileUtils.moveDirectory(FileUtils.java:2748)
  	at org.ametys.skinfactory.model.SkinModelDAO.applyModel(SkinModelDAO.java:311)
  	at org.ametys.skinfactory.model.SkinModelDAO.applyModelToAll(SkinModelDAO.java:252)
  	... 92 more